2020 Map of Arco Pass

About this map

The Challis National Forest dominates this high-altitude landscape in Butte County, where the southern reaches of the Lost River Range meet the broad expanse of the Little Lost River Valley. This 2020 survey illustrates a complex network of drainage systems and deep canyons, including the significant Taylor Canyon-Arco Pass and the ironically named Horsethief Canyon. The terrain transitions from the steep, craggy peaks of the range down into more accessible basin areas where seasonal water sources like Hurst Cr provide vital moisture in an otherwise arid environment.